Copy page creating draft and attachment folder taking storage space

Steps to reproduce:

1. Enable "Anonymous can user" permission in Global permissions
2. Go to Demonstration Space
3. Create a new page and attach some attachment to the new page
4. Log out Confluence and use Confluence as Anonymous user.
5. Go to the newly created page, click on Tools>>>Copy
6. Noticed that a nonspaced will created
   
   (the page was created 6pm yesterday, and i tried to copy the page once, and it create a folder with 900kb folder, and I try to copy again today, it increased the folder to 1.9mb)
7. Followed this kb to remove the draft from database
   
8. But the folder still remaining inside the server and taking storage space

Tested on Windows 7, Java 1.7.0_51-b13 64 bits, Mysql 5.5